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mod conductor;
mod performer;

pub mod chord;

use self::conductor::{Conductor, Hint, Message};

use crate::model::{CommonStyles, Renderer, Schema, TaggedValue};

use std::borrow::Cow;
use std::io;
use std::sync::mpsc::{sync_channel, Receiver, SyncSender};
use std::thread::JoinHandle;

pub type Music = Vec<u8>;

pub struct Orchestra {
    styles: CommonStyles,
    pipe: SyncSender<Message>,
    cond: (JoinHandle<Result<(), OrchError>>, Receiver<Music>),
}

impl Orchestra {
    pub fn new<S>(schema: S) -> io::Result<Orchestra>
    where
        S: Schema + Clone + 'static,
    {
        let (sender, receiver) = sync_channel(32);

        let styles = schema.get_common_styles();

        let renderer = Renderer; // ::new (&cset);
        let schema = schema;

        let cond = Conductor::run(receiver, renderer, schema)?;

        Ok(Orchestra {
            styles: styles,
            pipe: sender,
            cond: cond,
        })
    }

    pub fn get_styles(&self) -> CommonStyles {
        self.styles
    }

    pub fn play(&self, level: usize, value: TaggedValue) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Value(level, value))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn volume_border_top(&self, print: bool) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::BorderTop(print)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn volume_border_bot(&self, print: bool) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::BorderBot(print)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn directive_yaml(&self, print: bool) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::DirectiveYaml(print)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn directive_tags(
        &self,
        tags: Vec<(Cow<'static, str>, Cow<'static, str>)>,
    ) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::DirectiveTags(tags)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn volumes(&self, size: usize) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::Volumes(size)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn vol_next(&self) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::VolumeNext))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn vol_end(&self) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::VolumeEnd))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn vol_reserve(&self, size: usize) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::VolumeSize(size)))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn the_end(&self) -> Result<(), OrchError> {
        self.pipe
            .send(Message::Hint(Hint::TheEnd))
            .or_else(|_| Err(OrchError::Error("Conductor has quit already".to_string())))
    }

    pub fn listen(&self) -> Result<Music, OrchError> {
        match self.cond.1.recv() {
            Ok(music) => Ok(music),
            Err(_) => Err(OrchError::Error(String::from("orchestra vanished"))),
        }
    }
}

pub enum OrchError {
    Error(String),
    IoError(io::Error),
}

impl From<io::Error> for OrchError {
    fn from(err: io::Error) -> OrchError {
        OrchError::IoError(err)
    }
}